Improve hanging indentation

[lkrms]

• [ ] Arrow function expressions shouldn't be indented when align-fn is enabled

  <?php
  fn() =>
      $foo
          || $bar;  // Remove indentation here
  

• [ ] Overhanging indentation should be applied when a chain operator is adjacent

  <?php
  $foo = bar('foo',
      'bar')  // Add indentation here
      ->baz()
      ->qux();